Line technicians had opinions.
Executives had opinions.
People who had watched helicopter videos on the internet had opinions.
Martin had reached the point where a new opinion felt less like help and more like another obstacle.
Ethan stopped beside him.
“When did it start?”
“Saturday.”
“What changed before Saturday?”
Martin looked at him.
“We’ve already reviewed the maintenance history.”
“I figured.”
Martin waited.
Ethan waited longer.
Finally Martin said, “Routine battery replacement Friday afternoon. Normal inspection. No faults afterward.”
“First failed start?”
“Saturday morning.”
Ethan nodded.
“Battery installation rechecked?”
“Three times.”
“I’m sure.”
Martin’s eyebrows moved.
Ethan was not being sarcastic.
That somehow made it more irritating.
Martin crossed his arms.
“What are you thinking?”
Ethan looked at the aircraft nose.
“Something disturbed during the battery work.”
“We checked every affected connection.”
“I believe you.”
Martin stared at him.
“Then what exactly are you suggesting?”
“That something can look connected and still behave differently under vibration.”
One of the remote engineers could hear them through Martin’s headset.
A voice asked, “Who is speaking?”
Martin looked at Ethan.
“Maintenance technician.”
The engineer said something Ethan could not hear.
Martin pointed toward an access area.
“Everything in there tested correctly.”
Ethan listened to another startup attempt.
Again.
Too early.
He asked, “Can we open that access panel?”
Martin looked at him for several seconds.
Then signaled a technician.
The panel was opened.
Ethan did not touch anything immediately.
That mattered.
He looked.
He compared.
He followed the recent work mentally.
Battery replacement.
Access disturbance.
Connector seating.
Startup vibration.
Intermittent signal.
Shutdown without a clean diagnostic signature.
His father’s voice appeared from thirty years earlier.
What changed before it failed?
Ethan pointed.
“That connector.”
Martin looked.
“It’s seated.”
“Looks seated.”
“We tested continuity.”
“I believe you.”
“You keep saying that.”
“Because I do.”
Martin crouched.
“What do you see?”
“Nothing.”
Martin stared.
Ethan smiled faintly.
“That’s why it took three days.”
He explained the suspicion without pretending certainty.
The connector appeared seated, but the locking mechanism might not have fully engaged after the nearby battery work.
Static checks could still appear normal.
During a specific vibration phase of startup, however, a marginal connection could interrupt communication just long enough for the sequence logic to reject continuation.
Martin’s expression changed.
Not because he was convinced.
Because the theory matched the one unexplained detail they had failed to fit into anything else.
The early timing.
A technician examined the connector under the approved maintenance procedure.
Then reseated and verified it.
There was a faint click.
Tiny.
Almost nothing.
Martin heard it.
Ethan heard it.
So did the technician.
Nobody said anything.
Martin signaled the cockpit.
“Try it.”
The startup sequence began.